Performance of Pfaffia paniculata extract towards corrosion mitigation of low-carbon steel in an acidic environment

International Journal of Industrial Chemistry

دوره 11، شماره 4، اسفند 2020، صفحه 267-278

نوع مقاله: research article

شناسه دیجیتال (DOI): https://doi.org/10.1007/s40090-020-00222-0

نویسندگان

Rajesh Haldhar¹؛ Dwarika Prasad^{* 2}؛ Harshita Saharan¹

¹Department of Chemistry, Lovely Professional University, Punjab, 144411, India

²Department of Chemistry, Shri Guru Ram Rai University, Dehradun, 248001, India

چکیده

Low-carbon steel (LCS) in 0.5 M sulphuric acid is used to check the corrosion resistance performance of Pfaffia paniculata (P. paniculata) root extract. Notably, P. paniculata showed 91% corrosion resistance efficiency at 600 mg/L concentration. The adsorption of this inhibitor follows the Langmuir adsorption isotherm suggesting its monolayer formation on the LCS surface. The potentiodynamic polarization experiments indicated its nature as mixed adsorption behaviour. P. paniculata shows 88.34%, 90.16%, and 91.59% inhibition efficiency by weight loss, polarization, and EIS technique respectively. The scanning electron microscopy and atomic force microscopy techniques were used for the verification of protective layer on the LCS surface. The protective film formation study was checked using the UV–Vis. spectroscopy. Computational investigations were consolidated as a valuable report. All acquired outcomes confirmed that P. paniculata root extract can develop an efficient protective layer and resist the corrosion procedure.

کلیدواژه‌ها

Electrochemical impedance spectroscopy؛ AFM؛ Gravimetric experiment؛ Theoretical studies؛ SEM